// Book opens the overview's booking dialog via router state, so a reload does not reopen it.
export type FrontDeskHeaderAction = "book";

export const FRONT_DESK_HOME = "/dashboard/receptionist";
export const FRONT_DESK_APPOINTMENTS = "/dashboard/appointments";

export interface FrontDeskActionState {
  frontDeskAction?: FrontDeskHeaderAction;
}

export const readFrontDeskAction = (state: unknown): FrontDeskHeaderAction | undefined => {
  const action = (state as FrontDeskActionState | null)?.frontDeskAction;
  return action === "book" ? action : undefined;
};

export interface FrontDeskActionGrants {
  search: boolean;
  register: boolean;
  book: boolean;
}

type MayCall = (method: string, path: string) => boolean | undefined;

/**
 * Header actions follow the caller's grants, not the workspace title: Search needs patient search, Register
 * patient creation and Book appointment creation. A grant the server has not yet answered is drawn only for
 * the front desk, whose actions these always were; an explicit refusal is never drawn. A patient viewer gets
 * none, and a closed practice refuses its staff the patients they reach, so it gets none either. Only the
 * Receptionist and Practitioner decks draw these actions, so every other workspace gets none.
 */
export const frontDeskActionGrants = ({
  isPatientViewer,
  closedToStaff,
  isReceptionist,
  deskWorkspace,
  mayCall,
  noAccess,
}: {
  isPatientViewer: boolean;
  closedToStaff: boolean;
  isReceptionist: boolean;
  deskWorkspace: boolean;
  mayCall: MayCall;
  /** The gateway refused this member here; the page below says so and offers only Sign out. */
  noAccess?: boolean;
}): FrontDeskActionGrants => {
  if (isPatientViewer || closedToStaff || !deskWorkspace || noAccess) return { search: false, register: false, book: false };
  const granted = (method: string, path: string) => {
    const answer = mayCall(method, path);
    return answer === true || (answer === undefined && isReceptionist);
  };
  return {
    search: granted("GET", "/Patient"),
    register: granted("POST", "/Patient"),
    book: granted("POST", "/Appointment"),
  };
};